WO2021175622A1

WO2021175622A1 - Folding front tool-holder device

Info

Publication number: WO2021175622A1
Application number: PCT/EP2021/054230
Authority: WO
Inventors: Emmanuel BOUTROIS
Original assignee: Holdy Clem
Priority date: 2020-03-03
Filing date: 2021-02-19
Publication date: 2021-09-10
Also published as: FR3107802A1; FR3107802B1

Abstract

The invention relates to a device (100) comprising at least one tool (15) and a tool-holder device (10) intended for being attached to the front of an agricultural machine or of a public works machine. According to the invention, such a device (100) comprises: - a frame (11) having a cradle (17) forming a support; and - at least one support arm (12₁, 12₂) comprising means for rigidly connecting to said tool (15), said arm (12₁, 12₂) being pivotably mounted with respect to said frame (11) of said device (10) between at least two positions in the front plane of said frame (11): - a deployed position, wherein said arm (12₁, 12₂) extends out of said frame (11); - a folded position, wherein said arm (12₁, 12₂) is pivoted by 180° with respect to the deployed position; the pivot axis of said support arm (121, 122) with respect to said frame (11) being oriented in a direction that is inclined with respect to the longitudinal axis of said frame (11) by an angle of between 40° and 50°, said device being configured so that said tool (15) rests on said cradle (17) forming a support in said folded position.

Description

FOLDING FRONTAL TOOL HOLDER

Field of the invention

The field of the invention is that of agricultural tools and construction tools.

More specifically, the invention relates to a device comprising at least one tool and a tool holder device, intended to be secured to the front of a machine, such as an agricultural machine or a public works machine, for example.

State of the art

It is known to provide a folding of the arms of a front tool holder of an agricultural tractor, in order to allow road transport.

There are known tool holder techniques for which the tools are oriented vertically in the folded position.

These techniques have the drawback that the center of gravity of the assembly formed by the tool holder and the tools, when the tools are raised, is high, which unbalances the tractor.

Another drawback of these known techniques is that the tools arranged vertically mask the view of the driver of the tractor.

Objectives of the invention

The object of the invention is therefore in particular to overcome the drawbacks of the state of the art mentioned above.

More precisely, the object of the invention is to provide a folding tool holder technique which does not unbalance the machine to which it is attached when it is folded up.

An objective of the invention is also to provide such a technique which is reliable.

Another objective of the invention is to provide such a technique which is simple to implement, and of reduced production cost.

Another objective of the invention is to provide a folding tool holder technique which does not mask the view of the operator of the machine to which the tool holder is attached. Disclosure of the invention

These objectives, as well as others which will appear subsequently, are achieved using a device comprising at least one tool and a tool holder device capable of receiving said tool, intended to be secured to the front of the machine. a machine, in particular an agricultural machine or a public works machine.

According to the invention, said tool holder device comprises: a coupling head having at least one cradle forming a support extending in a transverse direction;

a frame having means of articulation with said coupling head forming a ball joint; and

- at least one support arm comprising means for securing to said tool, called lateral tool, said arm being mounted to pivot relative to said frame of said device between at least two positions in the front plane of said frame: - an extended position, in which said arm extends out of said frame;

- a folded position, in which said arm is rotated by 180 ° relative to the deployed position; the pivot axis of said carrier arm relative to said frame being oriented in a direction inclined relative to the longitudinal axis of said frame at an angle between

40 and 50 ° and preferably substantially equal to 45 °, said device being configured so that said tool rests on said cradle forming a support in said folded position.

Thus, in a novel and clever way, the invention proposes a tool holder device which makes it possible to store the tool in the folded position so that it extends in a direction substantially parallel to the longitudinal axis of the device. .

In addition, in the folded position, the tool can rest on a cradle, which makes it stable. Advantageously, said means for securing to said tool comprise means for adjusting the locking position of said tool with respect to said support arm.

Thus, the tool can be oriented relative to the direction of advance of the tool holder, for example to allow lateral shifting and greater grip of the tool in the ground.

In a particular embodiment of the invention, the means for adjusting the position of said tool with respect to said carrying arm are configured so as to be able to incline the longitudinal axis of the tools by an angle of between 0 and 30 ° with respect to in a direction perpendicular to the longitudinal axis of the chassis.

In an advantageous embodiment of the invention, said tool holder device comprises a jack, the body of which is secured to said frame and the rod is secured to said support arm.

According to a preferred aspect, said jack is a hydraulic jack.

In an advantageous embodiment of the invention, the means for securing said rod with said supporting arm comprise a rod articulated in rotation at its ends relative to said supporting arm and said frame and whose body is articulated in rotation relative to said cylinder head.

Preferably, said tool holder device has two supporting arms each having means for securing to a tool, said two supporting arms being mounted to pivot with respect to said frame along pivot axes that are symmetrical with respect to the longitudinal axis of said frame.

It is thus possible to drive two tools symmetrically with respect to the direction of advance of the tool holder device.

According to a particular embodiment of the invention, said tool belongs to the group comprising at least:

- roll for destruction of plant cover;

- smooth roll of sealing;

- crosskill roller; - vibrocultor;

- broom ;

- snow plow;

- leveling blade.

In a particular embodiment of the invention, a device as described above comprises means for securing said frame with a central tool mounted or formed substantially on the longitudinal axis of said frame.

According to an advantageous aspect of the invention, in said folded position, the width of said device is less than 3.5 m.

The device, which respects the road gauge for agricultural machinery, can thus be transported on the road.

In another particular embodiment of the invention, in said folded position, the width of said device is less than 2.55 m.

In a particular embodiment of the invention, said means for securing said carrying arm with said tool comprise means for pivoting said tool with respect to said carrying arm about a horizontal axis.

The position of the tool can thus be adapted according to variations in the height of the ground.

In a preferred embodiment of the invention, a device as described above is configured to be secured to an agricultural tractor.

List of Figures

Other characteristics and advantages of the invention will emerge more clearly on reading the following description of an embodiment of the invention, given by way of simple illustrative and non-limiting example, and the appended drawings, among which:

- Figure 1 is a top view of an example of a tool holder device of a device according to the invention in the deployed position, secured to a coupling head; - Figure 2 is a detail view of the connection between the head of a jack of the device shown with reference to Figure 1 and a support arm and the frame of this device;

- Figure 3 is a top view of the tool holder device shown with reference to Figure 1, where the side tools and the front central rollers are offset by approximately 20 ° from their deployed position illustrated in Figure 1 for allow shifting on the ground;

- Figure 4 is a detail view of the connection between a carrier arm and a side roller;

FIG. 5A illustrates the tool holder device presented with reference to FIG. 1 in a deployed position;

FIG. 5B illustrates the tool holder device presented with reference to FIG. 1 in a first intermediate folding position;

FIG. 5C illustrates the tool holder device presented with reference to FIG. 1 in a second intermediate folding position;

FIG. 5D illustrates the tool holder device presented with reference to FIG. 1 in a folded position;

FIG. 6A shows a top view and a front view of a lever for adjusting the relative position of a lateral or central tool with respect to the tool holder device presented with reference to FIG. 1;

- Figure 6B is a partial sectional view of the securing area of a supporting arm of the tool holder device shown with reference to Figure 1 with a side tool;

- Figure 6C is a partial top view of a side tool;

FIG. 6D is a partial top view of a supporting arm of the tool holder device presented with reference to FIG. 1;

FIG. 7A is a top view of the area for securing a supporting arm of the tool holder device presented with reference to FIG. 1 with a lateral tool, in which the lever presented with reference to FIG. 6A is in a position first tool locking position, where the tool is perpendicular to the longitudinal axis of the frame of the tool holder device shown with reference to Figure 1;

- Figure 7B is a top view of the area of attachment of a supporting arm of the tool holder device shown with reference to Figure 1 with a lateral tool, in which the tool perpendicular to the longitudinal axis of the chassis of the tool holder device presented with reference to FIG. 1 and the lever presented with reference to FIG. 6A is in a first intermediate position for unlocking the tool;

- Figure 7C is a top view of the securing area of a supporting arm of the tool holder device shown with reference to Figure 1 with a lateral tool, in which the tool is inclined by 20 ° with respect to a direction perpendicular to the longitudinal axis of the frame of the tool holder device presented with reference to FIG. 1 and the lever presented with reference to FIG. 6A is in a second unlocking position of the tool;

FIG. 7D is a top view of the area for securing a supporting arm of the tool holder device presented with reference to FIG. 1 with a lateral tool, in which the lever presented with reference to FIG. 6A is in a position second locking position of the tool, where the tool is inclined by 20 ° with respect to a direction perpendicular to the longitudinal axis of the frame of the tool holder device presented with reference to FIG. 1.

Detailed description of the invention

There is illustrated in Figure 1, a first embodiment of a device 100 according to the invention, in a deployed position.

This device 100 comprises a tool holder device 10 comprising a coupling head 18 and a welded frame 11 on which are pivotally mounted, on each side of the longitudinal axis 14 of the frame 11, two supporting arms 12i and 12 ₂ around the axes 13i and 13 ₂ .

As can be seen in Figure 1, the axes 13i and 13 ₂ form an angle of 45 ° with the longitudinal axis 14. Cutlery destruction rollers 15 equipped with angles and formed from an assembly of several sections mounted on self-aligning bearings are secured to each of the supporting arms 12i and 12 ₂ .

In the deployed position shown in Figure 1, the side tools 15 are oriented perpendicular to the longitudinal axis of the frame 11.

Two front central rollers 16i and a rear central roller I6 ₂ are respectively fixed to the front and to the rear of the chassis 11, at the level of the longitudinal axis 14.

The frame 11 is mounted under the coupling head 18 and is connected to the latter by means of a ball joint which projects forward (not shown in FIG. 1).

It should be noted that the use of a traction ball joint coupled to the coupling head 18 advantageously makes it possible to make the frame 11 self-directional and to allow automatic recentering.

The coupling head 18 has in its front part two cradles forming a support 17, which extend on each side of the longitudinal axis of the coupling head, perpendicularly thereto.

A double-acting hydraulic cylinder 19, with flow regulation, is mounted between the frame 11 and each of the supporting arms 12i and 12 ₂ . The body of these jacks 19 is mounted to pivot relative to the front of the frame 11 and the end of the rod of these jacks 19 is mounted to pivot (around the axis 23) relative to the body of a rod 20, in the shape of a "V", the ends 21 and 22 of which are articulated in rotation with respect to a support arm 12i or 12 ₂ and with respect to the rear of the frame 11, as can be seen in FIG. 2.

FIG. 3 shows the device 10 with side rollers 15 and central rollers I6 ₁ , the orientation of which has been offset by 20 ° with respect to that shown in FIG. 1 so as to form an "X", in order to to allow a shifting of the rollers 15 and I6 ₁ on the ground, when the rollers 15 are deployed. This adjustment of the locking position of the rollers 15 and 16i relative to and to the carrying arms 12i and 122 is made possible by actuating levers 32, which make it possible to rotate the rollers 15 and 16i around the vertical axes 31 and 33 respectively.

A single lever 32 has been shown in FIG. 6A, in a top view (on the left in FIG. 6A) and a side view (on the right in FIG. 6A). This lever 32 has, in the same alignment, a first arm 61 and a second arm 62 extending on either side of an axis 63. These two arms 61 and 62 are offset in height on the axis 63. A fixing plate 64 extends on either side of the axis 63, substantially at mid-height between the first arm 61 and the second arm 62.

As can be seen in FIG. 6B, in a view in partial section of the area of attachment of the support arm 12i with a tool 15, the fixing plate 64 is fixed by two bolts 65 at two corners of a plate 66 fitted to the tool 15, of square shape, shown alone in top view in FIG. 6C. The fixing plate 64 is kept spaced from the plate 66 by spacer tubes 67. A circular slot 68 is drilled in the plate 66 so as to be able to accommodate the lower end of the shaft 63 therein.

The tool 15 is mounted to pivot relative to the support arm 12i about the axis 31. It can be seen in FIG. 6D which is a top view of the free end of the support arm 12i, that the latter has a plate. circular 69 which is positioned vis-à-vis the plate 66, when the tool 15 is secured to the support arm 12i.

The circular plate 69 has a slot 610 which is substantially triangular and symmetrical with respect to a radius of the circular plate 69 passing through the upper edge 614 of this slot 610, the sides of which are in arcs of a circle. In this particular embodiment of the invention, the lower left edge 612 of the slot 610, the axis 31 and the lower right edge 613 of the slot form an angle of 20 °, from the top to the axis 31. light 610 ensures the positioning of the second arm 62 relative to the carrier arm 12i, during the pivoting of the lever 32. The operation of the system for adjusting and locking the position of the tool relative to the support arm 12i is presented in more detail with reference to FIGS. 7A to 7D.

In FIG. 7A, the first arm 61 of the lever 31 is pushed as far as possible to the right and is stored against the carrier arm 12i, parallel to the latter. In this position, the tool 15 extends in the extension of the carrier arm 12i, perpendicular to the longitudinal axis of the frame 11. The distal end 611 of the second lever arm 62 being housed in the lower left corner 612 of the light 610 and the axis 63 being housed in the lower right corner 613 of the light 610, the tool is locked in this position.

When the lever arm 61 is rotated to the left, the lever 32 pivots around the axis 63 and the distal end 611 of the second lever arm 62 describes an arc of a circle to go to the upper corner 614 light 610, as can be seen in FIG. 7B, which allows the tool 15 to be released.

As you continue to pull or push the first lever arm 61 to the left, the lever 32 pivots around the distal end 611 of the second lever arm 62, which remains housed in the upper corner 614 of the lumen 610, and the axis 63 moves in an arc of a circle to the lower left corner 612 of the lumen 610, causing the tool 15 to rotate about the axis 31, as can be seen in FIG. 7C. In the position shown in Figure 7C, the tool 15 has rotated 20 ° relative to the position shown in Figures 7A and 7B and is therefore inclined at an angle of 20 ° relative to a direction perpendicular to the longitudinal axis of the chassis 11.

To lock the tool 15 in this inclined position, it suffices to pull or push again the first lever arm 61 to the left, until it is along the support arm 12i, in a 180 ° position. compared to that shown in Figure 7A.

Indeed, by pulling or pushing the first lever arm 61 to the left, the lever 32 pivots about the axis 63, which remains housed in the lower left corner 612 of the lumen 610, and the distal end 611 of the second lever arm 62 describes an arc of a circle to position itself in the lower right corner 613 of the light 610, as shown in FIG. 7D.

A substantially identical adjustment and locking system makes it possible to orient the central rollers with respect to the frame 11.

It will also be noted that the rollers 15 are mounted to pivot relative to the carrying arms 15 about a horizontal axis 41 in order to follow the variations in height from the ground, as can be seen in FIG. 4, in a detail view. There is shown in Figures 5A to 5D different positions of the tool holder device 10 between a deployed position (Figure 5A) and a folded position (Figure 5D).

From the deployed position shown in Figure 5A, when actuating the jacks 19, they pull the support arms 12i and 12 ₂ and drive them in pivoting. The arms 12i and 12 ₂ tilt progressively upwards until they reach a first substantially vertical position, shown in FIG. 5B. The arms 12i and 12 ₂ then swing downwards by folding over the frame 11. They reach a second intermediate position shown in FIG. 5C then a folded position, shown in FIG. 5D, in which the arms 12i and 12 ₂ are folded back. at 180 ° to the deployed position shown in Figure 5 and where the side tools 15 lie flat on the cradles 17, which gives stability and rigidity to the device in this position. In the folded position, the side tools 15 are oriented parallel to the longitudinal axis 14. It can be seen in FIG. 5D that the side tools 15 are in alignment with the tractor and do not protrude from the sides, which makes it possible to move around on a road.

Claims

1. Device (100) comprising at least one tool (15) and a tool holder device (10) adapted to receive said tool (15), intended to be secured to the front of a machine, in particular of a machine agricultural or public works machine, characterized in that said tool holder device comprises: a coupling head (18) having at least one cradle (17) forming a support extending in a transverse direction;

- a frame (11) having articulation means with said coupling head (18) forming a ball joint; and

- at least one carrier arm (12 _I , 12 ₂ ) comprising means for securing to said tool (15), said side tool, said arm (12 _I , 12 ₂ ) being mounted to pivot relative to said frame (11) of said device between at least two positions in the front plane of said frame (11):

- a deployed position, in which said arm (12 _I , 12 ₂ ) extends out of said frame (11);

- a folded position, in which said arm (12 _I , 12 ₂ ) is pivoted by 180 ° relative to the deployed position; and in that the pivot axis of said carrier arm (12 _I , 12 ₂ ) with respect to said frame (11) is oriented in a direction inclined with respect to the longitudinal axis of said frame at an angle of between 40 and 50 ° and preferably substantially equal to 45 °, and in that said device is configured so that said tool (15) rests on said cradle (17) forming a support in said folded position.

2. Device according to claim 1, characterized in that said means for securing to said tool (15) comprise means for adjusting the locking position of said tool (15) relative to said carrier arm (12 _I , 12 ₂ ).

3. Device according to any one of claims 1 and 2, characterized in that said tool holder device (10) comprises a jack (19) of which the body is secured to said frame (11) and the rod is secured to said carrier arm (12 _I , 12 ₂ ).

4. Device according to any one of claims 3, characterized in that said cylinder (19) is a hydraulic cylinder.

5. Device according to any one of claims 3 and 4, characterized in that the means for securing said rod with said carrier arm (12 _I , 12 ₂ ) comprise a rod (20) articulated in rotation at its ends (21 , 22) relative to said support arm (12 _I , 12 ₂ ) and to said frame (11) and whose body is articulated in rotation with respect to said cylinder head.

6. Device according to any one of claims 1 to 5, characterized in that said tool holder device (10) has two supporting arms (12 _I , 12 ₂ ) each having means for securing to a tool (15), said two supporting arms (12 _I , 12 ₂ ) being mounted to pivot with respect to said frame (11) along pivot axes that are symmetrical with respect to the longitudinal axis of said frame (11).

7. Device according to any one of claims 1 to 6, characterized in that said tool (15) belongs to the group comprising at least:

- roll for destruction of plant cover; - smooth roll of sealing;

- crosskill roller;

- vibrocultor;

- broom ;

- snow plow; - leveling blade.

8. Device according to any one of claims 1 to 7, characterized in that it comprises means for securing said frame (11) with a central tool (16 ₁ , 16 ₂ ) mounted or formed substantially on the longitudinal axis. of said frame (11).

9. Device according to any one of claims 1 to 8, characterized in that, in said folded position, the width of said device (100) is less than 3.5m.

10. Device according to any one of claims 1 to 9, characterized in that said means for securing said carrier arm (12 _I , 12 ₂ ) with said tool (15) comprise means for pivoting said tool (15) relative to said carrier arm (12 _I , 12 ₂ ) around a horizontal axis.

11. Device according to any one of claims 1 to 10, characterized in that it is configured to be secured to an agricultural tractor.

12. Device according to any one of claims 1 to 11, characterized in that the means for adjusting the position of said tool (15) relative to said carrier arm (12 _I , 12 ₂ ) are configured so as to be able to tilt the 'longitudinal axis of the tools (15) at an angle of between 0 and 30 ° relative to a direction perpendicular to the longitudinal axis of the frame (11).